Flathead County, MT
The federal environmental record for Flathead County (population 113,679): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
7
federal cleanup sites
2
PFAS-detecting water systems
5
TRI facilities
63
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Anaconda Aluminum Co Columbia Falls Reduction Plant | Columbia Falls | on the NPL | 09/09/2016 |
Drinking water: PFAS testing
Public water systems serving Flathead with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| KALISPELL PUBLIC WORKS MT0000259 | PFOS: 6.6 ng/L PFHxS: 5 ng/L | above final limit |
| ALPINE VILLAGE WUA MT0003229 | PFOS: 4.1 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
5 facilities in Flathead filed TRI reports for 2024, totalling 149k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| WEYERHAEUSER NR | COLUMBIA FALLS | Methanol, Ammonia | 149k lb |
| JTL GROUP-KALISPELL DBA KNIFE RIVER - KALISPELL | KALISPELL | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Polycyclic aromatic compounds | 97 lb |
| CITYSERVICEVALCON LLC KALISPELL BULK FACILITY | KALISPELL | Polycyclic aromatic compounds, Benzo[g,h,i]perylene | 0 lb |
| CITYSERVICEVALCON LLC SOUTH PLANT BULK FACILITY | KALISPELL | - | 0 lb |
| WEYERHAEUSER NR | KALISPELL | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 314 tank facilities in Flathead: 239 tanks in service and 653 closed. 273 fuel releases are on record, of which 63 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Flathead as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Flathead, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- A & B NORGE LAUNDRY & CLEANING VILLAGEKALISPELL
- ANACONDA ALUMINUM CO COLUMBIA FALLS REDUCTION PLANTCOLUMBIA FALLS
- BEAVER WOOD PRODUCTSCOLUMBIA FALLS
- BR-HUNGRY HORSE DAMHUNGRY HORSE
- BURLINGTON NORTHERN (SOMERS PLANT)SOMERS
- KALISPELL POLE & TIMBER CO INCKALISPELL
- VALLEY DRIVE ABANDONED SLURRYKALISPELL